Driving mechanism for cash-registers.



G. F. KETTERING. DRIVING MECHANISM FOR CASH REGISTERS.

APPLIOATIOI! FILED JUNE 11, 1906.

Paiented June 8, 1909.

2 SHEETS-SHEET 1.

O. F. KETTERING. DRIVING MECHANISM FOR CASH REGISTERS. APPLICATION FILEDJUNE 11, 1906.

924,616, Patented June8,1909.-

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CHARLES F. KETTERING, OF DAYTON, OHIO, ASSIGNOR TO NATIONAL CASHREGISTER COMPANY, OF DAYTON, OHIO, A CORPORATION OF NEW JERSEY.

DRIVING MECHANISM FOR CASH-REGISTERS.

I Specification of Letters Patent.

Patented June 8 1909.

Application filed June 11, 1906. Serial No. 321,243.

tion.

This invention relates to motoredriving devices, and has for its objectto provide an improved form of motor for use with intermittentlyoperated machines.

I have shown my invention as applied to a cash register, but it isevident that it may be used with many other .types of machine,

and in fact may be .used with any machines which require to .be drivenonly intermittently.

:In particular 'my invention comprises an electric motor and connectionstherefrom to a cash register, and means controlling the motor-circuit toallow the motor to run only long enough for a com lete operation of theregister, and :then to al ow the motor to stop.

I have shown .the motor-circuit as controlled remaining active until thecompletion of the operation of the machine.

I have shown my invention as applied toa well-known cash register, theinvention of Thomas Carroll, on which an application for patent has beenfiled, Serial No. 172,970,

iled September 12, 1903. This machine comprises a plurality of banks ofkeys, which are adapted to be depressed in accordance with the amount tobe registered, and power is furnished to the machine for the operationthe eof by means of a crank-handle. I have substituted the motor-drivingdevice shown in this application in place of the cranktures ofconstruction and combination ofparts, the essential elements of whichare set forth in appended claims and a preferred form of embodiment ofwhich is hereinafter specifically described with reference to the itwill also be seen that pin 17, will raise lever 18 drawings whichaccompany and form part of this specification.

Of said drawings: Figure 1 is an elevation of the right-hand side of themachine, showing the motor. Fig. 2 is a vertical section through one of.the'banks of keys, showingthe detent therefor. Fig. 3 is a detail ofthe contacts taken on line 33 of Fig. 1. Fig. 4 is a theoretical diagramof the circuits employed, and Fig. 5 is a diagram of the circuits asused in the machine. I

In the use of this machine the value keys are depressed, and some oneclerks or department key segregates ,the transaction, and suchdepression of the transaction key is employed to'close a contact in anauxiliary circuit. This auxiliary circuit includes the coil of a relayand a magnetic clutch, so that when the circuit is closed the relay is.energized and the armature thereof closes contacts for themotor-circuit. The energizing of the clutch connects the motor rigidlyto the registering mechanism, and it will be noted that in thearrangement of circuits de scribed the clutch is energized and caused tocontact the usual soft iron disk before the circuit is made through themotor. same order of operation prevails at the close of the movement, sothat whenthe motor circuit is broken, the clutch has alreadydisconnected the motor from the machine, and

the motor has practically no load thereon.

In generalterms, the machine may be-said to comprise a series of valuekeys 10 shown in Fig. 1, and a series of special clerks or transactionkeys 11, best shown in Fig. 2.

These keys carry on each of them a pin 12, which, when the keys aredepressed, is

adapted to ride over cam edges 18 on a detent 14 and raisthe same. Whenthe key reaches the extreme inward position the pin 12 allows the detent14 to partially resume its normal position through slots 15 in the Thedetent. This construction is well known in connection with cashregisters. The detent 14= carries near the middle thereof a projection16, bearing a pin 17, whichpin is adapted to move a lever 18, pivoted ona shaft 19. This lever 18 is adapted to be rotated during the operationof the machine to release the keys from the detent, but when the keys14, through its against the tenare depressed the detent 5differentially, depending on the key deressed, such movement being dueto the fact that the keys strike the segment at different distances fromits center, and also to the fact, as shown in Fig. 2, that the pins 12of the various keys'are normally at different distances from the edge ofthe segment, so that there will in each case be a different amount oflost motion. The segment 21 has at the bottom thereof a' part 23,carrying a pm 24, which is in-position to engage and rock an arm 25 on ashaft 26.

Referring now to Fig. 1, it will be seen that this shaft 26 carriesrigidly therewith an arm 27, having at the extreme end thereof an '6anti-friction roller 28, moving in a cam slot in a lever 30, said leverbeing journaled on a pin 31. This cam slot 29 for most of its length isstruck from the shaft 26 as a center, but at one end, as shown in Fig.1, the slot is 25 at an angle, and it follows from this structure thatwhen shaft 26 is rocked against tension of spring 27 the pin 28 willride down the angular portion of the slot 29 and rock the lever 30around its pivot 31. Lever 30 car- 30 ries at the rear thereof an arm32, having a projection 33, normally engaging a notch 34 in a disk 35,mounted on a shaft 36. This shaft 36 is. the main rotation shaft of themachine, and as will be seen from the previous description is normallylocked by the projection 33 of lever 32. The pivot 19 which carries arm18, adapted to be moved by the transaction keys, has also rigid therewith an arm 37, in which is mounted a spring-pressed plunger 38, havingan insulated head. This insulated head is adapted to engage main-contactspring 39, shown in Figs. 1 and 3, and it will be seen from the previousdescription that this contact 39 is moved away from its co-actingcontacts 40 and 40 during the depression of the key. As was ggeviouslystated, the key when depressedst raises the arm 18 and then lower's itagain. This movement will raise the insulated plunger and then lower itat the end of the key stroke, so that the contact is broken during thestroke of the key. The lever 30, previously referred to, carries at thea top thereof an insulated roller 41, bearing on a'contact spring 42',adapted to engage a cooperating contact 43, and also to engage contact40, as best shown in Fig. 3.

It will be evident from the previous description that when thetransaction key 11 is depressed the segment 21 will be rocked around itspivot 22, and will thereby rock lever 27, and the oblique cam slot 29will then raise the lever 30 and its roller 41. This will allow thespring contact 42 to engage and connect contacts 40 and 43. The

electric motor for the machine is indicated in dotted lines in Fig. 1,and is designated by the numeral 44. The armature shaft 45 car ries aworm 46, and this engages a gear 47 on a stub-shaft 48. Movable with thegear 47 is a second gear 49, the teeth of which mesh with the gear onshaft 36. ires 50 and 51 indicate the circuit for the magnetic clutch,which comprises the usual coils and disk mounted on shaft 48. A relay 52is carried by the motoraframe, and its armature 53 is adapted to closethree contacts, 54, 55 and 56. A push-key 57 when operated closescontacts 58 and 59, and this finally closes the circuit for the machine.

Referring now to the diagrams, and first to Fig. 4, it will be seen thatthe current for the circuits is supplied byfa battery or other generator60. A wire 61 leads from one pole of the generator to the motor 44, butthe motor circuit is normally broken at the relay contacts 54,55 and 56.A shunt wire 62 includes the coil of relay 52, and the wire 63 connectsthe other end of the coil to the relay contact 55. This shunt circuit isnormally broken at the point 64*. The push key 57 is, as previouslystated,adapted to close the contacts 58 and 59. In this theoreticaldiagram the contact 64 occupies the place in the circuit of the contact39, 40, 40 42 and 43 in the machine. This contact would therefore beclosed by the depression of any transaction key, but the circuit isstill incomplete, and is only completed by the momentary depression ofkey 57. When this key is closed a circuit will be made from the batterythrough wire 61, shunt 62, including contact 64 relay-coil 52, wire 63,wire 64, contacts 59 and 58, wire 65, and wire 66 back to the battery60. This circuit, it will be noted, does not include the motor, but doesinclude the relay 52. will thereu on be energized and attract itsarmature, cqosing the contacts 54, 55 and 56. Themotor circuit is nowcompleted through wire 61, wire 67, motor 44, wire 68, contacts 54 and56 and wire 66 back to the battery. The motor thereupon begins itsoperation. It will be noted that when contacts 54, 55

and 56 are closed, that the shunt circuit now does not need to includecontacts 58 and 59 closed by the ush-key, inasmuch as the circuit willnow e made through wire 62, contact 64 relay-coil 52, wire 63, contacts55 The relay and 56 and wire 66 back to the battery. '120 Referring nowto Fig. 5, it will be seen that this figure shows the circuit used inthe machine and in this figure contacts 39, 40, 40 42, and 43 areseparately indicated. When one of the transaction keys 11 is depressed,

, the elevation of its detent and the consequent 13 static .39 willagain be in engagement with contacts 40 and 40. At the end of the keystroke theshaft 26 will be rocked and the lever arm 27 on said shaftwill consequently rock the plate 30 carrying pin 41 away from contactspring 42 which is thereby lifted to engage contacts 40 and 43. Thisrockin of plate 30 and lever 32 serves to release the coking pro jection33 from disk ,35. The key 57 is next momentarily depressed, closingcontacts 58 and 59 and a complete circuit is then made,

including battery 60, wire 61, shunt 62, contacts 58 and 59, wire 70,contacts 40, 39, 40, 42 and 43, wire 71,.relay-coi-l 52', wire 7 3clutch 69 and wire 66,back to the battery. This will energize both therelay-coils and the clutch coil thereby connecting the motor to themachine. When the armature of the relay is attracted, contacts '54, 55,and 56 are closed and the motor circuit is then complete includingwire61, wire 67, contacts 55 and 56, wire 68 and motor 44 back to thebattery, the motor will immediately start and operate the register. Theclosing of.conta'cts 54 and 55 energizes a branch of the main circuitwhich runs to contact 40 and from thence back to the battery throughcontacts 42 and 43, wire 71, relay-coil 52, wire 73, clutch 69 and wire66', but this branch circuit does not include contact 39 or contacts 58and 59. so that, even though push-key 57 is released, the circuit isstill retained complete and the motor continues its operation. With themachine described the keys are released almost immediately after theoperation begins and this'is the reason for the provision of contact 39.The motor circuit, including the branch 72, does not include contact 39,so that this may be broken in the first part of the operation withoutstopping-the motor. The divided circuit including shunt 72 includestherelay-coil as well as the armature contacts so that the relay remainslocked and the motor circuit consequently closed until the spring arm 42is depressed and the motor circuit thereby broken. It is true that thereturn of the segment 21 will permit the arm 27 to return to itsnormalposition nearly, but the-downward movement of the plate 30 todepress spring contact 42 will not e permitted until the disk 35 hasmade a complete rotation inasmuch as its periphery rides on theprojection 33 and prevents upward movement thereof. When disk 35completes its rotation and notch 34 therein is again over the projection33, spring 27 may rock the arm 27 causing the circuit to be broken at42and at the same instant locking the machine by projection 33. With thearrangement of circuits shown the clutch circuit is made and brokenbefore the motor circuit so as to produce a sequence of operations whereractically no load is on the motor when t e motor circuit is broken,although the time interval between the making or breaking of the clutchand motor circuits is very small. With ,this construction the disk 35may be locked, but no strain is thereby produced on themotor as theclutch has been previously deenergized and the motor may therefore runon until its energy is exhausted.

It will be evident that if an-atteni' t is made to manipulate themachine .by he ding key 57 depressed, the attempt will fail, inasmuch asthe circuit is broken at contact 42 by the operation of the machine.

While the form of mechanism here shown and described is admirablyadapted to fulfil the objects primarily stated, it is to be understoodthat 1t is not intended to'confin'e the invention to the one form ofembodiment herein disclosed, for it is susceptible of embodiment invarious forms all coming within the scope of the claims which follow.

What is claimed is as follows:

1. In a cash register the combination with an electric motor and acircuit for same including contacts, of a push key and connec-' tionsfor closing said motor circuit, and means for maintaining said motor.circuit locked closed while said push key returns to normal position.

2. In a cash register, the combination with an electric motor and acircuit for same including contacts, of a circuit including a relay forclosing said contacts, a key for closing the circuit through said relay,and a shunt circuit through said relay coil closed by the movement ofthe armature'of said relay.

3. In a cash register, the combination with an electric motor, of astarting circuit therefor, contacts in said circuit, keys forcontrolling said contacts, means requiring a complete' depression of akey to close said contacts, and a key for closing another contact insaid starting circuit.

4. In a cash register, the combination with an electric motor and acircuit including same, of a circuit including a relay for closing saidmotor circuit, and also including primary and secondary break devices,keys for closing said break devices separately, and means formaintaining said relay circuit closed irrespectiveof the return of saidprimary break device to breaking )ositio'n.

5. In a'cash register, the com in'ation with an electric motor and acircuit therefor, of a shunt circuit including a relay and primary andsecondary make and break devices for closing the motor circuit, keys forclosing said make and break devices separately, and a second shuntincluding said primary make and break device for maintaining said relaycircuit closed irrespective of the release of said secondary make andbreak device.

6. in a cash register, the combination with an electric driving deviceand a circuit for i with an electric driving device for the masame, of akey for closing said circuit at will, means for breaking said circuitduring the motion of the key, and means for-maintaining said circuitclosed after the key is released.

7. In a cash register, the combination with an electric motor and acircuit for saine,'ol a shunt circuit including primary and secondarymake and break devices, keys I or closing said make and break devicesseparately, means in said shunt circuit for closing said motor circuit,and asecond shunt closed by the movement of said means, and maintainingsaid motor circuit closed.

8. In a cash register, the combination with an electric motor and anormally incomplete circuit for same, of a circuit including a relay andprimary and secondary make. and break devices for closing saidmotorcircuit, manipulativedevices for operating said primary make andbreak device, a tap pushkey for operating said secondarymake and breakdevice, and a shunt to said secondary make and break devices forretaining the relay circuit closed.

9. In a cash register, the combination with an electric motor for thesame, a motor circuit including contacts, a circuit including a relayfor closing said motor circuit, a plurality of keys controlling saidrelay circuit, and means for breaking said relay circuit during thedepression of a key.

10. In a cash register the combination with an operatmg mechanism andmeans normally looking same, of an electric motor for driving saidmechanism, a circuit for said motor, a controlling circuit for saidmotor circuit, and a plurality of keys for closing said controllingcircuit and unlocking said operating mechanism.

11. In a cash register, the combination with an electric motor and acircuit theref or, of a controlling circuit for said motor circuithaving a plurality of contacts in series therein, a plurality of keysfor closing said contacts, and means for maintaining said motor circuitclosed after said keys have been released. I

,12. In a cash register, the combination with a circuit including arelay, a contact in said circuit, keys for closing said contact, anadditional contact in said circuit, means for opening said contactduring the stroke of the key, a locking device for the machine and meanscontrolled by said keys for operating said locking device.

13. In a cash register, the combination with a normally locked operatingmechanism, and an electric motor for drivingsame, of a controllingcircuit for said motor, a contact in said circuit and a series of keysfor closing said contact and operating said looking device.

l4.- In a cash register, the combination chine and a circuit includingsame, of a controlling circuit for said motor circuit includingcontacts, a series of keys, a member common thereto, a cam deviceoperated by said member when any key is operated to control saidcontact, and means for returning said cam to normal position.

15. In a cash register, the combination with an electric driving devicefor the mai chine and a circuit including same, of a circuit, includinga relay for controlling said motor circuit, a series of keys, a memberoperated thereby having apin, anda lever having a cam slot with whichsaid pin engages for closing said relay circuit.

16. In. a cash register, the combination with an electric motor fordriving same and a line circuit for said motor, of a shunt to the motorcircuit having contacts, a relay in said shunt for controlling saidmotor circuit, a second shunt to the line, and keys for closing aplurality of breaks in said second shunt.

17. In a cash register, the combination with an operating mechanism andmeans normally locking the same, of an electric motor for driving saidmechanism, a circuit including said motor, a shunt including contactsand a relay for closing and locking the motor circuit, a key, and amemberccontrolled by said key for closing said shunt contacts andoperating said locking mechanism.

18; In a cash register, the combination with an operating mechanism, ofa motor normally disconnected from said operating mechanism, means forconnecting said motor thereto, a circuit including contacts for concuit,and means for holding said motor circuit closed after the startingclrcuit has been 3 opened. g

20. In a cash register, the combination with an electric motor, and acircuit for same with primary and secondary controlling contacts, of aseries of keys for closing said primary contact, a single manipulativedevice for closing the secondary contact, and means controlled from themotor for breaking said secondary. contact.

21. In a cash register, the combination with an operating mechanism anda device for driving same normally disconnected therefrom, means forconnecting said device to the operating mechanism, means actuated withthe connecting means for, causing the driving device to start, and meansfor retaining the driving device and connecting means in operation.

22. Ina cash register the combination with closed by the movement of thearmature of an'electric-motor and a circuit for same insaid relay.- 10eluding eentaets, of a: circuit inelu ding'a' 11e- In testimony whereqfI affix my signature lay for closing sz'iideentactS, said circuit ininthe presence of two' witnesses. 5 eludingprimary-and' secondarybreakde'. CHARLES F. KETTERING.

vices, keys for closing said; p'rimary' and 'sec Witnesses: ondary breakdevice's sepa'rately; and a shunt, v Ro'Y'C. GLASS,

circuit around said secondary break device .H'CARL'W. BENST.

